Different application fields:
PA6 has relatively good toughness and is commonly used in climbers, automobile structural parts, etc.
PA66 is a tough and hard material used in industrial gears such as marine propellers and other engineering accessories.
The injection molding process conditions of the two are different
. 1. The drying treatment method is different.
PA6 drying treatment: Since PA6 can easily absorb moisture, special attention should be paid to drying before processing. If the material is supplied in waterproof packaging, the container should be kept closed. If the humidity is greater than 0.2%, it is recommended to dry it in hot air above 80C for 16 hours. If the material has been exposed to the air for more than 8 hours, it is recommended to perform vacuum drying at 105°C for more than 8 hours.
PA66 drying treatment: If the material is sealed before processing, then drying is not necessary. However, if the storage container is opened, drying in hot air at 85°C is recommended. If the humidity is greater than 0.2%, vacuum drying at 105°C for 12 hours is required.
2. Different melting temperatures
: PA melting temperature: 230~280℃, for reinforced nylon it is 250~280℃.
PA66 melting temperature: 260~290℃. The temperature of glass modified products is 275~280℃. Melting temperatures above 300°C should be avoided.
3. Different mold temperatures.
PA6 mold temperature: 80~90℃. Mold temperature significantly affects crystallinity, which in turn affects the mechanical properties of plastic parts.
Mold temperature: 80℃ recommended. Mold temperature will affect crystallinity, and crystallinity will affect the physical properties of the product.
4. Different injection speeds
: PA6 injection speed: fast (slightly lower for reinforced nylon).
Runner and gate: Since the solidification time of PA6 is very short, the location of the gate is very important. The gate hole diameter should not be less than 0.5*t (here t is the thickness of the plastic part). If using a hot runner, the gate size should be smaller than if using a conventional runner because the hot runner can help prevent premature solidification of the material. If a submersible gate is used, the minimum diameter of the gate should be 0.75mm.
PA66 injection speed: fast (should be slightly lower for reinforced materials).
Injection pressure: usually 750~1250bar, depending on material and product design.
Baozhuan New Materials has halogen-free flame retardants specifically for PA6 and PA66. BZ-LX190 is a halogen-free flame retardant specifically for nylon and PBT with phosphorus and nitrogen as the main flame retardant elements . It has high flame retardant efficiency, no precipitation, good water resistance, light aging resistance, low smoke and non-toxicity. It has very high thermal stability, and the decomposition temperature is ≥ 360℃.
In addition, Baozhuan New Materials also has laser engraving masterbatches and laser engraving powders for PA.
Laser engraving powder BZRC330 can be used on the surface of plastic (PA, PBT, PET, PP, PE, ABS, etc.) to mark black patterns or text. The product is environmentally friendly, non-toxic to the human body and harmless to the environment.
Laser engraving masterbatch BZRC600 is specially used for non-flame-retardant PA. It can quickly absorb laser light (red light or purple light) and generate heat on the plastic, making it appear white. This product is easy to disperse, has high tinting strength and is resistant to migration.
Laser engraving masterbatch BZRC880 is specially used for flame-retardant PA. It can be used on plastic surfaces to mark white or black patterns or text. This product is easy to disperse, has high tinting strength and is resistant to migration.
Baozhuan New Materials also specially develops and produces lubricating and dispersing agents that have a very good demoulding effect on nylon. The dispersing lubricant BZDM035 has a particularly significant demoulding effect on nylon .
